robert



(No Model.)

B. KOENIG.

LOOKING LATCH.

No. 436,761. Patented Sept. 16,1890).

WITNESSES: v "INVEINTOR Mg %;47W/ ErmL K [1 E m BY 7 WW Q QMQWL ATTOR NEY UNITED STATES PATENT ()FFICE.

EMIL KOENIG, OF NEW YORK, N. Y., ASSIGNOR TO DANIEL KOPS, ROBERTLAMBERT, HENRY V. LAMBERT, AND AUGUST V. LAMBERT.

LOCKING-LATCH.

SPECIFICATION forming part of Letters Patent No. 436,761, datedSeptember 16, 1890. Application filed February 18, 1890- Serial No.340,932. (No model.)

To all whom it may concern.-

Be it known that I, EMIL KOENIG, a subjectof the Emperor ofAustria-Hungary, residing at the city of New York, in the county of NewYork and State of New York, have invent-ed a new and useful Improvementin Locking- Latches, of which the following is a specification.

The nature of the invention consists in the details of combination andconstruction, substantially as illustrated in the accompanying drawings,hereinafter described, and subse- V quently pointed out in the claim.

My invent-ion relates to that class of locking-latches commonly known asdead-locks, and has for its objectto produce a simple and inexpensivedevice whereby the bolt of such look when it has been moved eitherforward or backward will be held firmly in position, substantially ashereinafter described and claimed.

Figure I is an edge view of my newly-invented lock. Fig. II is asectional view of the same, taken on a line parallel to theparting-plate and illustrating the interior of my said lock. Figs. IIIand IV are detail views showing the operation of the bolt. Fig. V is asectional view of the escutcheon-tube. Fig. VI is a detail view of theturning-post and its eccentric.

In the several figures, a designates the escutcheon-tube, b the casingof the lock, and c c the bolt. The front end of the bolt is beveled inthe usual way at c. The back end of the bolt is formed with twobranches, designated, respectively, by e and c. This bolt slides in thecasing in the common and wellknown way. The turning post 't' n, whichextends on either side without the casing and is supported thereby,stands in the space between the tines e e of the bolt. The stop t" andthe eccentric i are carried by this post and Work against the pins h andh, which are fastened in the top sides of said tines e e of the bolt,the said stop and eccentric extending over the top side of said tinesfar enough to engage said pins. A helical spring 0, extending betweenthe pins 0 and 6, assists the motion of the bolt. The escutcheon-tube,which is of the usual form, is adapted to cover the upper end of thepost i, and is provided with a warding-pin a.

The key may be of any convenient form; but I prefer to use a fiat key,which, passing down through the escutcheon-tube a, has a notch cut inits edge corresponding to the pin a, and has its end adapted to a slotin the upper end of the post 4;. If the post 2' and the cam c'" beturned from the position illus trated in Fig. IV to that illustrated inFig. II, the corner of the cam impinging upon the pin h will force thebolt backward. When the bolt has moved far enough backward, the cornerof the cam will pass the pin h, the stop c" come against the pin h, andthe parts take the position illustrated in Fig. III, and the bolt willbe firmly held in that position.

If the post i be turned in the opposite direction, the cam t'" movesaway from the pin it toward the pin it and the stop 1." from. the pin ch toward the pin h. As soon as the bolt is released the elasticity ofthe spring 0 causes it to spring forward into a locked position. Then ifthe motion of the post last described be further continued the partswill assume the position illustrated in Fig. IV and the bolt will beheld firmly in locked position. The post 'i may be turned from theescutcheon side by a key, which maybe as hereinbefore described; or aconvenient knob may be mounted on the tine n, by which it may be turnedfrom the opposite side.

Otherwise than as herein described my invention may be used as otherlocks of its class.

WVhat I claim as my invention, and desire to secure by Letters Patent,is-

The combination, with the casing and bolt of a lock, said bolt beingformed with branches, as specified, of a revoluble post 0 mountedin saidcasing between said branches,

a stop and a cam carried by said post and reaching over said branches ofsaid bolt, means, substantially as specified, for turning said post,pins upon the upper sides of the 5 branches of said bolt and adapted forengaging said stop and cam above the branches of once of two witnesses,this 14th day of J annsaid bolt, and a spring attached to said bolt ary,1890.

and said casing to assist the motion of said i bolt, all substantiallyas and for the purpose EMIL KOENIG' 5 set forth. Witnesses:

In testimony that I claim the foregoing as FREDERICK MCDONALD,

my invention I hereto set my hand, in pres- J. WHITTLE.

